Backpack



FIG. 1 is a top, front, right perspective view showing my new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is a bottom perspective view thereof.

The broken lines in the drawings showing stitching and surface ornamentdepict environment and form no part of the claim.

CLAIM The ornamental design for a backpack, as shown and described.